Sash-fastener



,UNITED sTATEs rnrEivrA oEEroE.

HENRY B. KIMBLE, OF ROCHESTER, YORK.

SASH-FASTENER.

Specification of Letters Patent No. 10,596, dated March' 7, 1854.

T 0 all wiz-0m t may concern.'

attached to a portion of the sash-rail, and

Fig. 2 is a plan of the weighted lever for moving the sliding bolt represented in Fig. 3, same letters of reference referring to like parts in all the gures, as also in Fig. 4 which is designed to illustrate the combined action of the lever and bolt.

The nature of my invention consists in combining a weighted lever with a sliding bolt as hereinafter more fully described so that when the gate or window-sash is in the intended position the weighted lever shall move forward the sliding bolt and secure the said' gate or window sash from moving, which object is also more fully obtained by the notch at d in Fig. 3 into which the point c of the weighted lever falls soas to prevent any movement of the bolt bein produced either by jarring or striking t e lock or pressing the bolt.

To enable others skilled in the art to make and use my invention I will proceed to describe its construction and operation.

I form a bolt of the shape represented in Fig. 3 and' a lever of the form shown in Fig.

`2, said lever having the mass of metal or other material represented at A yto act as a weight causing it to revolve on the pivot e and occupy when free the position shown in Fig. l. I also form a secondary notch in the bolt which notch is re resented at d positionlof the bolt and lever so that when the bolt projects the requisite' distance the point 0 of the lever will fall into the notch d of the bolt which entirely prevents the bolt from being driven back either by pressure or reactive percussion. This will readily appear on reference to Fig. 4. For since the bolt is prevented from moving vertically as it slides on the rm rest shown kbeneath it at D and as the center of the lever is also fixed by t-he pivot e no pressure on the bolt can cause the point of the lever to pass the vertical line passing through e so longas the said point lies on the lower side of the notch as represented in the ligure.A This is evident since two sides of every triangle are greater than the third. When ho-wever the weight A at the end of the lever is raised up it acts upon the point p of the bolt and easily slides it back so as to allow of the sash-0r gate being opened. But onbeing left fat liberty it again falls down and acting on the curve b of the bolt slides it forward until it falls into the notch d at which time it is checked'in its downward motion bythe cover B shown inFig. l.

Having thus fully described myvinvention, I would state that I am fully aware that a weighted lever has been used to move a sliding and independent bolt. I do not therefore claim the simple combination of the weighted lever with the sliding bolt, but n JOHN PHIN, WEL C. STows 

